Hygrometer for incubators.



G. H.V LEE. HYGBOMETBR FOB. INGUBATORS. APPLIcATIoN FILED JUNE s, 1908.

934,469, l Patented Sepa 14, 1909.

i n n WJESSL-S/ 'l /NVENTH eazgejlkee l I' Y el f ,1M B y v v AToHNEYs 'described hereinafter and particulnrlY 'figures r-lilriii.

@nenes noemen Les, .or menne, resellers.

nenoneinn non4 rnonnerons.

To all whom i1. may concern:

-Be it knorrn'that l, Geenen Hmmm) LEE,

:i-citizen of the United States, and e. resident of Omaha, Vin the county of longlas und State of Nebraska., have invented a new and- Inproved Hygrometer for Incubatore, oif

which the following is a full, clear, and

exact description. y

' This invention relates to nygrometers, und. the object of the invention is 'to produce n' hygrometer which will have a high degree of Y accuracy.

More particularly the invention relzites to hygrometers known :1s Wet bulb hygronr eters. and the invention provides improved means for holding the evaporeting fluid around the bulb. As Such hygrometers are usually constructed, e simple Wiel; is wrzipped tightly zn'oiind he bull), and the end oit' the wick depends into a reservoir. Such hygromelers have the disadvantage thm small particles olf solid mettewzxre leftin the fibers ot the lvick around the hulh of the ihermometer as the evaporation takes place, and these particles of solid matter clog the interetices and fibers of the Wick material, so to render theml less absoroenl; in lhis wey tlienmount or' evaporation becomes much reduced and the accuracy ofv the instrument' is in consequence much impaired. By my invention l provide an improved menne for securing the Wick to the bull), the eilicicncy of which cannot be readily impaired, :ind the construction of which enbles the Wick to he Figure l is n side elevation of a lrvgfromv eter constructed according to my invention, a .portion of the device being shown in cross section; Fig. 2 is an enc Viewed from the left of being broken away and l elevation- Fig. 1 certain parte! O l v shown in vcross sece' tion,- :md F 1g. 3 Vis n perspective of the ivicl;

Asi]@einemon fermiers raient. ineeiitedepe. .application sied here niece. semi ne. essere.

. this seele are formed on both tube end are elternetely long; and slior",

stood' lo correspond to lhe. i020 lo y of the Wick,

or cepilliirv member 'which rei es ine liquid l f 4 V Il s* troni-the reservoir to the liermonietei unie where'the emporaieion .telies place.

more' pertienlsriy to the parte,

l represenls rho shield or fece plete of the thermometer 2, having n 3 and e bult; l et the end thereof and protiecting from the faceplate or shield l, es shown. lie-fece plate' of the thermometer is provided mme vseele .indicating percentages of atmospheric c, di, of eof the The division lines o.

seuration.

indicel'ed. Furthermore, 1the scale is formed so that o long division merli on one'side of the tube lies opposite to e short division narlr on the opposite side of the tube. ln placing the numbers on the scale, the seine number is given to four divisions beginning at the bottom and progressing upwardly and toward the right so that in reading the seele.y the lmverniost row (a) Will be under- .temperature on o dry-hull) reading, the next one above (7)) `will. correspond with the 1030 temperw ture and so on. ln taking ille reading' of the ihermometer es illi'istreted in l, if.

the incubator temperature were w3", the hygrometer reading vzvould 5oe 572e; if at rl temperature oi" lOfl-O, then the hygrometer reading would he 55 and so forth.

The thermometer 2 is supported by enit able bracket l shove e small tenir or reservoir '9 containing e liquid'l'l, Such as Weijer. ln this water a capillary member. such es e wiel: ll, depends, and he upper end of this Wick clinched to :i sleeve 12. This sleeve .is inode of two lolos of ill2 or simile-r refe terinl. which folds :1re not attached ioggetlner,l l

but are .simply placed one over the other, as shown. ln this wey sn inner sleevefend an enveloping ou'er sleeve is formed.

of the sleeve are open so *that the adapted. to he slipped over the hull) of the thermometer, 'as indicated-mosselen@ in The upper of the` reservoir ,9v

lic. l. 1s provided with :i guard plate or sliiefd 18,' over, which the iviclr il. passes so as ibo-holdy the sleeve l2 inem inclined position. Thisfl guard or shield operates to protect the hull) 4 from changes of temperature which miglr; be due to evaporation taking place in lthe thebulb due to evaporation isa by the evaporation that 't so that the temioeretnre et .n cated only v altes plecen the The ends 'sleeve :is

Mid

water at the bulb and is 'deposit of sleeve itself. The sleeve is preferably formed of silk which is doubled into a loop l so that the ends may be stitched to the wick.

After the sleeve is a plied to the bulb as indicated, evidently t e space between the two layers ot the material forming the ,sleevei acts in a capillary manner so as to draw u the water 4from the wiclr,'and forms as 1t were, a thin film of water enveloping the bulb and constantly evaporating. way I depend not so much upon-the capillarity ofthe fibers of which the sleeve is formed,

as I depend upon the capillary action of the narrow space between the two layers. This Gives' a constant quantity of evaporating little adected by the solid particles in layers which form the sleeve.

may be readily removed from the thermom eter bulb so as to enable its sleeve to be readily cleaned. The cleanlng of the sleeveis much facilitated by reason of .the fact that i its layers are not attached together except l at their point of connection witlr'pthe wick i body.

the sleeve is slipped lightly linto place, does not it tightly and bent-e,l the pressure upon the bulb does not the capiliarity of the sleeve. Also, both ends of the sleeve are open. rlhe act that the sleeve is open at its ends in no way interferes with the hygrometric action 'of the thermometer, for the air within the ends of the sleeve becomes thoroughly cooled and transmits its teu'iperature to the uncovered parts of the bulb.A The fact that the sleeve is not attached by bindings or similar dcvices to the bulb, is' advantageous as it enables the bulb to be readily removed for cleaning or when'a new wick is to be substituted .for an old one.

Having thus described my invention, I claim as new and la'tent,-

1. A wet bulb hygrometer comprising a thermometer having a bulb, in combination with a capillary member adapted to conduct a liquid to said bulb, and having a sleeve with its axis disposed laterally to said capii lary member, said sleeve being open at both In this the fibers of the Special attention is called to the facttliai l,

tend towletract from i desire to secure by Letters.

ends and adapted to be slipped over said being 2 ing open at both ends, said iayers forming capillary space therebetween.

A wick for. a

} having a'capillary body,

l ed to envelop the l forming a capillary space in said sleeve.

i. A wet bulb hygrometer comprising thermometer having a with a wick havingla layers forming a capillary space surroun ing said bulb.

A wet bulb hygrometer t used in incubators, havin -a tube, a scale along said tu or' division lines, disposedl in sections l placed from gitudinally of said tube, division' lines corresponding to said tube, an section. lines an have signed my of two subscribing witnesses.

y GEORGE HOWARD LEE.

Witnesses :V

F. E. CoATswoR'rri, R. A. JOHNSTON.; 5

bulb, in combination ythermometer tube and a :tace plate, said face from each other and formed of layers of material, said sleeve adapted to receive said bulb, and be- Wet bulb thermometer,

and a sleeve adaptthermometer bulb 'formed l of superposed layers or' material, said layers bulb, in combination sleeve attached to the The wick upper end thereof, said sleeve being lformed i or' two layers and adapted to be thrust over I said bulb and maintained thereupon, s'aldv adapted to be thermometer e indicating degrecs of saturation, said scale having seies 1salinement with each other lonsaid sections of said to diierent dry bulb thermometer temperatures oit the indry-bulb name to this specification in the presence 

